Powerwave Technologies 5JS0045 Multicarrier PCS Power Amplifier User Manual Section 3
Powerwave Technologies Inc Multicarrier PCS Power Amplifier Section 3
Contents
User Manual Section 3
044-05077 Rev. A 3-1
OPERATING INSTRUCTIONS
3-1. INTRODUCTION
This section contains operating instructions for the multicarrier PCS amplifier system.
3-2. LOCATION AND FUNCTION OF AMPLIFIER MODULE CONTROLS AND INDICATORS
Primary +27 Vdc power is applied to the amplifier via an 80-amp circuit breaker (ON-OFF) located
on the left side of the amplifier front panel.
The plug-in amplifier module RF control and indicators, located in the center of the amplifier front
panel between the cooling fans, are shown in figure 3-1. The status and RF control functions are
described in detail in table 3-1. The alarms are described in detail in table 3-2.
Figure 3-1. G3S-1900-80 Amplifier Module RF Control and Indicators
Section
3
044-05077 Rev. A 3-2
Table 3-1. Amplifier Module RF Control and Indicators Definition
NAME FUNCTION (Note: MCPA = Multicarrier Power Amplifier)
+27VDC
Indicator Green LED. When lit, indicates that the +27 Vdc supply is greater than
+21 Vdc and less than +31 Vdc. If the +27 Vdc indicator goes out, the
DC FAIL indicator will illuminate. This indicates that the +27 Vdc volt-
age dropped below +21 Vdc.
+15VDC
Indicator Green LED. When lit, indicates that the +15 Vdc supply is greater than
+12 Vdc and less than +17 Vdc. If the +15 Vdc indicator goes out, the
DC FAIL indicator will illuminate. This indicates that the +15 Vdc volt-
age dropped below +12 Vdc or increased above +17 Vdc.
+5VDC Indicator Green LED. When lit, indicates that the +5 Vdc supply is greater than
+2 Vdc and less than +7 Vdc. If the +5 Vdc indicator goes out, the DC
FAIL indicator will illuminate. This indicates that the +5 Vdc voltage
dropped below +2 Vdc or increased above +7 Vdc.
-5VDC Indicator Green LED. When lit, indicates that the -5 Vdc supply is greater than
-7 Vdc and less than -2 Vdc. If the -5 Vdc indicator goes out, the DC
FAIL indicator will illuminate. This indicates that the -5 Vdc voltage
dropped below -7 Vdc or increased above -2 Vdc.
RF ON Switch Three position switch:
Off (down position) - Turns off amplifier module.
On (center position) - Normal amplifier on position.
Reset (up position) - When toggled to reset position, all the red LED
indicators will turn on one at a time in sequence followed by all the
green indicators one at a time in sequence; this will also reset the fault
latches. If the switch is held in the reset position, a microcontroller re-
set will occur. This will be verified by the LEDs toggling state again.
The switch is spring loaded to return to the normal ON position when
released. If a fault occurs and the MCPA is disabled, the alarms can
be cleared and the MCPA enabled by this reset position. The functions
of the switch are disabled for five seconds after a power-up condition.
044-05077 Rev. A 3-3
Table 3-1. Amplifier Module RF Control and Indicators Definition (cont.)
A ‘Minor Alarm’ will flag a potential fatal problem by the LEDs and the MCPA fault will be in
evaluation. A ‘Critical Alarm’ is indicative of a fatal problem. The fault indicator will latch on and
the MCPA module will be disabled. A ‘Major Alarm’ indicates a major problem but the MCPA
module will not be disabled. Both ‘Major Alarm’ and ‘Critical Alarm’ will be sent to the host system
via the MCPA subrack.
ALARM CATEGORY LED MCPA
MODULE
MCPA
DISABLE
SIGNAL
(Pin 4 in
Table 2-1)
CONDITION
Over Pwr Critical Red Disable High MCPA module output power >110
watts (Note 4)
Over Pwr Critical Red Disable High Input power >-3 dBm
High Temp Minor Red Enable Low High temperature detected
High Temp Critical Red Disable High High temperature detected for longer
than two minutes
VSWR Minor Red Enable Low Reflected power detected at output
>12 W
VSWR Critical Red Disable High Reflected power detected at output
>50 W longer than approx. two min.
DC Fail Minor Red Enable Low One of the internal DC voltages
dropped below or exceeded the safe
threshold level
DC Fail Critical Red Disable High Voltage out of range for longer than
approx. two minutes (Note 2)
DC Fail
(Over voltage) Minor Red Disable Low +27 Vdc input >31 V detected (note
3)
DC Fail
(Over voltage) Critical Red Disable High +27 Vdc input >30 V for longer than
one sec. after initial detection of DC
input >31 V (Note 3)
Fan Fail (one) Major Red Enable Low Any fan failure
Loop Fail Minor Red Enable Low Loop failure detected
Loop Fail Critical Red Disable High Loop failure detected longer than two
minutes
Low Pwr Minor Red Enable Low Rack controller detected MCPA out-
put is 3 dB below that of the other
MCPA in the system.
Low Pwr Critical Red Disable High Rack controller detected low power
condition for more than approx. two
minutes
LPA DISAB. Critical Red Disable High Unit is manually switched off using the
front panel RF ON switch, or disabled
by a serial command or auto shut-
down by an alarm condition.
NOTES:
1. RS-485 serial alarm will follow LED status.
2. The appropriate status LED shall turn off indicating which voltage is out of its range.
3. When overvoltage is detected:
a) MCPA shall shut down (disable)
b) Turn on red DC Fail LED
c) Set flag for DC Fail alarm
044-05077 Rev. A 3-4
4. When overpower is detected:
a) MCPA shall shut down (disable)
b) Turn on Over Pwr LED
c) Set flag for Over Pwr alarm
d) The MCPA module shall use a peak power detector to determine the overpower fault.
3-3. INITIAL START-UP AND OPERATING PROCEDURES
The amplifier module has two operating controls, both located on the front face of the module: the
power ON - OFF switch and the RF ON - ON/OFF/RESET switch. To perform the initial start-up,
proceed as follows:
1. Double check to ensure that all input and output cables are properly connected.
CAUTION
Before applying power, make sure that the input and output of the
amplifier are properly terminated at 50 ohms. Do not operate the
amplifier without a load attached. Refer to table 1-2 for input
power requirements. Excessive input power may damage the am-
plifier
NOTE
The output coaxial cable between the amplifier and the antenna must
be 50 ohm coaxial cable. Use of any other cable will distort the output.
2. Verify that the amplifier front panel switches are in the OFF position.
3. Turn on supply that provides +27 Vdc to the amplifier system. Do not apply an RF
signal to the amplifier system
4. Place the ON - OFF circuit breaker on the amplifier in the ON position. Visually check
the indicators on the amplifier module, and verify that the following indicators are on:
a. LPA DISAB. indicator (red) should be on.
b. The +27VDC, +15VDC, +5VDC and -5VDC indicators (green) on the amplifier
module should be on.
5. Set the RF ON switch to the ON (center) position. All red LEDs should turn off after
six seconds.
6. Turn on external exciter/transceiver and apply RF input signals.